I pulled my slide out of carb to make sure my needle was on third notch. I did not look at it like I should have. But when you look at bottom of slide there is 3 holes. I know 2 of them are for the screws. The third one if I am looking at it from the bottom should I be able to see right through the hole? Or should it be covered to where I can see the hole and the plate that the screws are in?